Weird output when using output style "nested"

[rredel]

When using output style nested, the output adds line breaks and whitespace which actually breaks the css. This only happens when using multiple selectors as a basis.

Input:

input[type=text],
input[type=number],
input[type=search],
input[type=tel],
input[type=url],
input[type=password],
input[type=email],
input[type=date]
{
    + label
    {
        &:after
        {
            content: '';
        }
    }
}

Expected output:

form input[type=text] + label:after,
form input[type=number] + label:after,
form input[type=search] + label:after,
form input[type=tel] + label:after,
form input[type=url] + label:after,
form input[type=password] + label:after,
form input[type=email] + label:after,
form input[type=date] + label:after

Current output:

form input[type=text]
+ label
:after
,
form input[type=number]
+ label
:after
,
form input[type=search]
+ label
:after
,
form input[type=tel]
+ label
:after
,
form input[type=url]
+ label
:after
,
form input[type=password]
+ label
:after
,
form input[type=email]
+ label
:after
,
form
input[type=date]
+ label:after